[amsat-bb] Re: Linear transponder versus FM transponder for LEOsatellites

2009-11-09 Thread Alan VE4YZ
> i8CVS Domenico wrote...
> The problem here with many new and young satellite operators 
> is like to have many young sparrow that don't know how good 
> is the flavour of wheat

> Joe WB9SBD wrote
> 
> I still to this day fail to see how hard it is to twist a VFO knob.
> 
> Have we all become soo much appliance operators that we all have 
> forgot to know how to turn a VFO knob to keep someone in tune?

> OZ1MY wrote:
> Why not just be happy to get one more transponder for us to use ?
> ...
> It is interesting to note that there are far moreoperators on the
> FM transponder satellites than on the linear satellites 
> in Low Earth  Orbit.
> 
>...I think we should say thank you to our friends in SA for 
> a new one.

I find it easy to on side with many of these and similar comments.  I don't
believe they are mutually exclusive.  It is easy to agree to all these.  And
another BIG THANK YOU from EN19 too!

So rather than waiting for an expensive and probably impossible ride for an
AMSAT built satellite LEO or otherwise, FM vs Linear Transponder, perhaps it
is time for AMSAT UK, DL, NA et al to be proactive and DONATE a transponder
and antennas to the next university CubeSat or Pico sat project.  Something
such as PE1RAH William Leijenaar's transponder board.  A RFP to all those
universities now in the planning stages could be sent, an international
AMSAT review committee struck to evaluate the merits of those submissions
and then finally an annual ( or more often ) donation of the hardware.  And
to heck with ITAR.  If AMSAT NA is hamstrung then I authorize them to take
my life membership and transfer the remaining unused portion to AMSAT DL, UK
etc.

We buy, they ride and in the spirit of the "Delfi Model" we all win.

And then there is the Genso initiative to assist those universities in
near-whole-earth-orbit data acquisition.

Wow.. Why wouldn't they buy into that.

I've stated it here before and I'll repeat it.  I don't believe we will ever
see another HEO.  We amateurs need to connect with, mentor to and volunteer
for cube sat and pico sat efforts that are being initiated at the university
level.  They have the funding, sweat equity and the rides. 

And a final reminder, they don't need a ham licence to download telemetry
for their science experiments on UHF.  They really don't need us.  We need
them.  UHF; we are the secondary user.

Well, actually one more final reminder.  We cannot on one hand dumb
everything down to an FM HT experience and on the other hand with the AO-40
model do CC-Rider, baud rates in excess of 9K6 etc.  There is even a smaller
installed base of equipment for those modes than the linear transponder SSB
on UHF and VHF.  So I don't buy into the argument that FM is the only way to
go just because there are more handy talkies than SSB base stations.  If
that was valid then AO-40 with all it's exotic modes should never have got
off the drawing board.

What would y'all do with a dozen FO-29's or VO-52's or a dozen DO-64's with
a working voice transponder or even a dozen SO-67's?  They are being planned
and built right now all around that world in universities and they will be
flying with or without us.  We can standby and wait.  Then complain after
they are launched.  Or you can check out what your local university is doing
right now and get involved.   They all need to set up and learn how to run a
ground station and that is an expertise you have and they need.  You can
train them to get their licences so they can do their command and control.
There are lots of ways to contribute other than writing a chegue.

We have a political saying up here "If you didn't vote, you have no business
complaining about your government".  There is an analogy for amateur radio.

Stepping off the soap box...

73, Alan VE4YZ
EN19kv
AMSAT LM 2352 
http://www.wincube.ca








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[amsat-bb] Re: Linear transponder versus FM transponder for LEOsatellites

2009-11-09 Thread JoAnne Maenpaa
It was mentioned ...

> We amateurs need to connect with, mentor to and volunteer
> for cube sat and pico sat efforts that are being initiated 
> at the university level.

Hmmm, sounds close to what was discussed at the October Board of Director's
meeting and early information released on www.amsat.org ... and the ANS news
bulletins ... and more details coming via the AMSAT Journal ... plenty
already going on the university front!

[From the current amsat web page]
Key University Space Projects Under Development

Barry Baines, WD4ASW, AMSAT President reported at the Annual Meeting that
the Board of Directors has agreed to participate in two exciting
University-based cooperative programs.

* First, AMSAT is having serious discussions with the University of
Florida, Gainesville to locate the AMSAT Lab on campus. This will put our
lab in a state of the art engineering facility. This is also the home of the
UF SwampSat CubeSat development team.
* The Board of Directors has agreed to partner with SUNY-Binghamton and
the IBM Systems Engineering Integration Center to mentor senior level
engineering students for the development of the NextGen CubeSat as their
'capstone' engineering project. Projects at SUNY-Binghamton are planned to
initially address the development of deployable solar cells and super
capacitor power systems.

[From the AMSAT News Service posted after the BoD meeting and Symposium]

SB SAT @ AMSAT $ANS-291.01
AMSAT Says "We're Going Back to Space"

AMSAT News Service Bulletin 291.01
>From AMSAT HQ SILVER SPRING, MD.
October 18, 2009
To All RADIO AMATEURS
BID: $ANS-291.01

The Board of Directors has adopted the Engineering Task Force 
recommendation that low-cost launch options be immediately pursued. 
The AMSAT engineering team will develop a 1U CubeSat design effective 
immediately. Tony Monteiro, AA2TX, Vice-President of Engineering said, 
"We are recommending an approach that gets AMSAT back up in space with 
new satellites by leveraging the skills and technology we have today."

The new AMSAT CubeSat's initial capability is planned to add to the 
popular low-earth orbit FM transponder fleet allowing hams to continue 
to use their existing handheld and portable antenna systems. This also
allows an accessible entry path for new satellite operators to get 
started. The existing FM satellites are starting to show their age.

The flight version of ARISSat-1 has been developed to fit into the 
CubeSat model. AMSAT's flexible Software Defined Transponder (SDX), 
simplified IHU, power control subsystem, external interfaces to ex-
perimental payloads and cameras will now allow a modular approach to 
mission design using proven subsystems and components. The ARISSat-1 
mission planned in 2010 will be the initial flight test of AMSAT's 
modular satellite.

Here are some of the highlights ...

+ AMSAT will develop comparable AO-51 level of performance packaged 
  into a 1U CubeSat. This includes a U-V transponder, V telemetry, 
  U command receiver, IHU, power control. This can be done with our 
  modular design.

+ This will be a U/V FM Transponder, not done before in a 1U CubeSat, 
  which can be worked with a HT and a simple antenna. CubeSat power 
  limitations are planned to be addressed through research and devel-
  opment of deployable solar-cells.

+ AMSAT will make our open-design satellite modules and technology 
  available for other satellite teams to build into their missions.

+ This new approach will provide a reliable radio link for future 
  CubeSats allowing university teams to concentrate on their scientific
  objectives.

+ The modular nature of the AMSAT CubeSat system will allow add-on 
  missions utilizing several different types of modulation and band-
  width. These can be pursued with future low-cost CubeSat launch 
  opportunities. 

AMSAT President, Barry Baines, WD4ASW Annual Meeting Powerpoint 
Presentation has been posted at http://www.amsat.org

[ANS thanks the AMSAT Board of Directors for the above information]

/EX


SB SAT @ AMSAT $ANS-291.02
AMSAT, IBM, SUNY-Binghamton Announce NextGen CubeSat Development

AMSAT News Service Bulletin 291.02
>From AMSAT HQ SILVER SPRING, MD.
October 18, 2009
To All RADIO AMATEURS
BID: $ANS-291.02

AMSAT will work with a university student engineering team to
develop the NextGen Cubesat.

NextGen Program Manager, Alex Harvilchuck, N3NP introduced this new
program at the AMSAT Symposium. Alex revealed program goals and its
initial plans with a paper in the Proceedings and presentations to
the AMSAT Board of Directors and to the attendees during Symposium
sessions.

NextGen consists of AMSAT volunteer mentors working with IBM Global
Services Systems Engineering Division, and SUNY-Binghamton (also 
called University of Binghamton) senior level engineering students 
participating in their 'capstone' engineering project. 

Alex summarized the NexGen program goals:

+ Intial analysis of ARISSat-1, documenting the systems, and analysis